1% of U.S. adults identify as nondenominational Protestants in the mainline tradition.

22% of this group lives in the Midwest, 9% live in the Northeast, 37% live in the South and 33% live in the West.

14% are between the ages of 18 and 29, 34% are ages 30 to 49, 29% are ages 50 to 65 and 19% are 65 and older.